JPH0381185A - Coupling medium - Google Patents

Abstract

PURPOSE:To prevent the release of a thermoplastic resin from a base sheet by providing a coupler layer on the thermoplastic resin layer provided on the base sheet and roughening both surfaces or single surface of the base sheet. CONSTITUTION:A coupling medium 1 is formed by providing a thermoplastic resin layer 3 on a surface roughened base sheet 2 and further providing a coupler layer 4 on the thermoplastic resin layer 3. When a manuscript 20 is irradiated with the light from a light source 30, only the microcapsules 11a of a photosensitive pressure-sensitive medium 10 corresponding to the transmitted part 20a of the manuscript 20 are exposed to be cured and, therefore, when said medium 10 is pressed using pressure rollers 40, only uncured microcapsules 11a are destructed and the dye precursor therein flows out to a coupler 4 and the destructed part forms a color and the reverse image identical to the image of the manuscript 20 is formed. At this time, since the base sheet of the coupling medium is subjected to sand blast processing, the adhesion of the thermoplastic resin layer and the base sheet is strong and both of them are not released even when passed through the pressure rollers 40.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention provides a base sheet having at least a color developer layer and a thermoplastic resin layer, plain paper or cloth.

This relates to a color developing medium that makes it possible to form images on plastic films, etc. [Prior art] Conventionally, microcapsules mainly containing a photocurable substance, a photopolymerization initiator, and a dye precursor; A photosensitive pressure sensitive recording medium is known in which a substance that develops color by reacting with a dye precursor contained in a capsule, that is, a color developer, is coated on the same surface. There is also one in which the microphone capsule and the color developer are coated on separate sheets. (Unexamined Japanese Patent Publication No. 58-23
025, JP-A-58-88739, JP-A-58-88740, etc.).

In this type of recording medium, the photocurable substance is cured by light and the microcapsules become rigid, so the surface is usually exposed to light according to the image information, and the microcapsules that have not been hardened by exposure are destroyed and the internal parts are A dye precursor is used in a device that forms an image by reacting with a color developer coated on the surface of a recording medium or on another sheet. However, according to this photosensitive and pressure sensitive recording medium, it is possible to record and form images on the specially processed photosensitive and pressure sensitive sheet itself, or on the aforementioned color developer sheet with only a color developer layer, but it is possible to produce images of the same quality. Ordinary paper such as postcards, cloth.

There was a problem that images could not be recorded on arbitrary materials such as plastic films.

Therefore, a color developing medium characterized by having a thermoplastic resin layer on a base sheet and a color developer layer further on the thermoplastic resin layer, and a photosensitive pressure sensitive sheet supporting microcapsules were developed. There is a method in which an image is formed on the developer layer of a color medium, 2, the surface of the developer layer on which the image is formed is aligned with the surface of the object on which the image is formed, such as plain paper or cloth, heated, and only the base sheet is peeled off. It is considered.

[Problems to be Solved by the Invention] However, since the base sheet of the conventional color developing medium uses polyester film, polyethylene film, polypropylene film, etc., which have a relatively smooth surface, the color developer layer does not have the image quality. The thermoplastic resin often peeled off from the base sheet during pressure fixing to form the base sheet.

In addition, after transferring the color developer layer of the color developer medium on which the image is formed onto the surface of the image-forming object such as plain paper or cloth and peeling off the base sheet, the surface condition of the base sheet remains unchanged on the surface of the thermoplastic resin. It became shiny and shiny. There are scratches in this shiny state.

In addition, stains such as fingerprints were noticeable, resulting in poor appearance and deterioration in image quality.

The present invention was made to solve the above-mentioned problems, and its first purpose is to make it simple and quick.

A developer image can be reliably formed on plain paper, plastic film, etc. in a single transfer process.It increases the adhesive strength between the base sheet of the developer medium and the thermoplastic resin layer, and prevents the formation of the thermoplastic resin layer that occurs during pressure fixing. The purpose is to prevent peeling from the base sheet. The second purpose is to transfer the color developer image to plain paper, plastic film, etc. and then apply a matte finish to the thermoplastic resin surface to make scratches and dirt less noticeable, improve the appearance, and improve the appearance of the image. The goal is to improve quality.

[Means for Solving the Problems] In order to achieve this object, the color developing medium of the present invention has a structure in which a thermoplastic resin layer is provided on a base sheet, and a color developer layer is further provided on the thermoplastic resin layer. , the base sheet has a rough surface on both or one side.

[Function] Since the base sheet of the color developing medium of the present invention having the above structure has a rough surface, the adhesive force between the thermoplastic resin and the base sheet increases, and after the base sheet is peeled off, the thermoplastic resin The base sheet has a rough surface and is embossed, giving the thermoplastic resin a matte finish.

[Example] Hereinafter, an example embodying the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view of the color developing medium of the present invention. Color developing medium 1
is a thermoplastic resin 3 on a base sheet 2 with a roughened surface.
Furthermore, a color developer layer 4 is provided on the thermoplastic resin 3.

First, a method for forming a color developer image on the surface 5 of an image-forming object such as plain paper, plastic film, cloth, etc. will be explained with reference to FIGS. 2 to 4. FIG. 3 is an explanatory diagram of a method of forming a latent image on the photosensitive pressure sensitive medium 10. As shown in the figure, first the light source 3
When light from 0 is irradiated through the original 20, only the microcapsules 11a of the photosensitive pressure sensitive medium 10 corresponding to the transparent portion 20a of the original 20 are exposed, and as a result, the microcapsules 11a in that area are hardened. As shown in the figure, when pressure is applied using the pressure roller 40, only the uncured microcapsules Ilb are destroyed, and the dye precursor inside flows out onto the color developer 4, causing color development in that part.
An identical inverse image of the image of the original 20 is formed. At this time, since the base sheet of the color developing medium of the present invention is sandblasted, the adhesion between the thermoplastic resin and the base sheet is strong and will not peel off even when passed through the pressure roller 40.

Next, a method for forming a color developer image on the surface of an image forming object such as plain paper, cloth, plastic film, etc. will be explained using FIG.

First, a color developing medium 1 on which an image is formed by the method shown in FIG.
The color developer layer surface 4 and an image forming object 5 such as plain paper, cloth, or plastic film are brought together and hot-pressed using a heating roller 6 as a heating means. Then, the color developer and binder in the color developer layer 4 melt and adhere to the image forming object 5, and then the color developer layer 4
By removing the base sheet 2, the developer image can be transferred to the image forming body 5. At this time, the thermoplastic resin 3 is in the same surface state as the surface of the sandblasted base film 2 and is in a matte state, so that scratches and dirt are not noticeable. Here, the heating means is 130°C and a feed rate of 10
Although a heating roller of mm/s is used, it is not necessary to use a heating roller as long as it can be heated, and a heat plate or the like may be used.

Next, the composition and manufacturing method of the photosensitive pressure sensitive medium will be briefly explained.

As shown in FIG. 3, the photosensitive pressure sensitive medium 10 has microcapsules 11 supported on a base sheet 12, and the microcapsules 11 are mainly made of photocurable resin.

Contains photopolymerization initiator and dye precursor. Typical examples of photocurable resins are ethylene glycol diacrylate and ethylene glycol dimethacrylate.

Trimethylolpropane triacrylate, diethylene glycol dimethacrylate, etc. are used as a photopolymerization initiator, and α-alkoxyphenyl ketone is used as a photopolymerization initiator.

polycyclic quinone, benzophenone, substituted benzophenone,
Xanthone, thioxanthone, etc., and dye precursors having structures such as lactone, lactam, spiropyran, etc., such as triarylmethane compounds,
Bisphenylmethane compounds, specifically crystal violet lactone, benzoyl leucomethylene blue, and the like. The capsules 11 of the photosensitive pressure sensitive medium 10 can be manufactured by a well-known method such as near-acervation method or interfacial polymerization method.
The proportions of the liquid substances in 1 are: 100 parts of photocurable resin, 3 parts of dye precursor, 2.5 to 4 parts of photopolymerization initiator, 1 part each of binder and plasticizer if necessary, Then, the amount of photosensitizer is adjusted to about 10% by weight of the polymerization initiator.

Next, the composition and manufacturing method of the color developing medium of the present invention will be described.

The base sheet 2 of the color developing medium 1 is a film with a roughened surface, such as a polyester film or a polyethylene film that has been subjected to sandblasting, embossing or chemical etching.

Polypropylene film or the like or metal foil can optionally be used. The thickness of the base sheet 2 can be about 50 to 200 μm, preferably about 100 μm. Furthermore, as the color developer for the color developer layer 4, any developer used in conventional photosensitive pressure sensitive sheets can be used. For example, acid clay, active viscosity, inorganic acid substances such as kaolin, phenolic compounds such as P-phenylphenol, salicylic acid, gallic acid,
There are aromatic carboxylic acid compounds such as propyltannic acid, which can be used alone or in combination. A binder can be mixed with this color developer in any proportion. Furthermore, the resin constituting the thermoplastic resin layer 3 is a substance that softens or melts when heated and solidifies when cooled. For example, vinyl resins such as vinyl alcohol/vinyl acetate copolymer, polyvinyl chloride, vinyl chloride/vinyl acetate copolymer, acrylic resins such as ethyl acrylate, butyl acrylate, methyl cyanoacrylate, styrene resin, polyamide resin, Examples include wax. In this example, the base sheet 2 of the color developing medium 1 was a 100 μm film of polyethylene terephthalate. For the thermoplastic resin layer 3, a mixture of styrene/acrylic resin and polyester was used.

When this resin is selected, the thermoplastic resin layer 3 and the color developer layer 4 are cut at the edge of the image forming body 5 as shown in FIG. In other words, before cutting (adhesive force between base sheet 2 of color developing medium 1 and thermoplastic resin layer 3)> (thermoplastic resin 3
and the stress necessary for shearing the color developer layer 4) (Adhesive force between the color developer layer 4 of the color developer medium 1 and the image forming body 5)
〉(Stress required for shearing of thermoplastic resin 3 and color developer layer 4) (Adhesive force between thermoplastic resin layer 3 and color developer layer 4 of color developer medium 1)〉(Thermoplastic resin layer 3 and color developer layer 4) The stress required for shearing the developer layer 4) is established, and after cutting (adhesive force between the developer layer 4 of the developer medium 1 and the image forming body)
(Adhesive force between base sheet 2 of color developing medium 1 and thermoplastic resin layer 3) (Adhesive force between thermoplastic resin layer 3 and color developer layer 4 of color developing medium 1)> (Base sheet of color developing medium 1) 2 and the adhesive force between the thermoplastic resin layer 3).

In addition, the color developer layer 4 is made of acid clay, bisphenol A, P-
Phenylphenol was used. Next, the coating method will be explained. 50wt% styrene-acrylic copolymer emulsion (1000cps) and 45wt% as thermoplastic resin layer 3
% of polyester solution (500 cps) and after adjustment, the base sheet of polyethylene terephthalate film 7 Teijin Matsutto Film SM (Kanairi Co., Ltd.) was prepared.
) It was applied to a thickness of 100 μm and dried in an oven at 110° C. for 1 minute. The film thickness after drying is 10 μm. Next, as the color developer layer 4, 50 parts of acid clay, 30 parts of bisphenol A,
30 parts of P-phenylphenol is dispersed in 60 parts of an aqueous solution of polyvinyl alcohol as a binder to form a developer dispersion solution, which is applied onto the dried thermoplastic resin layer 3. After coating, dry with hot air in an oven at 80℃ for 1 minute, and after drying
A .mu.m color developer layer was obtained. The color developing medium of the present invention is thus created.

[Effects of the Invention] As is clear from the detailed description above, according to the present invention, since the base sheet of the color developing medium has a rough surface, the adhesive force between the thermoplastic resin and the base sheet increases and pressure is reduced. It is possible to prevent the thermoplastic resin from peeling off from the base sheet, which often occurs during fixing. Also, after transferring the developer image to plain paper, plastic film, etc. and removing the base sheet, the thermoplastic resin surface becomes matte and scratches.

Dirt becomes less noticeable and the appearance improves.

[Brief explanation of drawings]

1 to 5 show embodiments embodying the present invention. FIG. 1 is a cross-sectional view of a color developing medium, and FIG. 2 is a method for forming a color developer image on the surface of an image-forming object. FIG. 3 is an explanatory diagram of a method for forming a latent image on a photosensitive pressure-sensitive medium. FIG. 4 is an explanatory diagram of a method for forming a visible image on a color developing medium. FIG. 3 is a diagram showing the relationship between film properties and adhesive properties. In the figure, 1 is a color developing medium, 2 is a base sheet, 3 is a thermoplastic resin layer, and 4 is a color developer layer.

Claims (1)

[Scope of Claims] 1. A color developing medium having a thermoplastic resin layer on a base sheet, and further a color developer layer on the thermoplastic resin layer that reacts with at least a dye precursor to develop color therein, comprising: A color developing medium characterized by having a rough surface on both or one side. 2. The color developing medium according to claim 1, wherein both or one side of the base sheet is a film that has been sandblasted. 3. The color developing medium according to claim 1, wherein the base sheet is a film that is embossed on both or one side. 4. The color developing medium according to claim 1, wherein both or one side of the base sheet is a film subjected to chemical etching processing.